JPH0473625U

JPH0473625U -

Info

Publication number: JPH0473625U
Application number: JP11641890U
Authority: JP
Priority date: 1990-11-06
Filing date: 1990-11-06
Publication date: 1992-06-29
Anticipated expiration: 2005-11-06
Also published as: JP2540359Y2

Description

[Brief explanation of drawings]

第１図は本考案に係るクラツチ倍力装置の一実
施例を示した縦断面図、第２図はその装置のコン
トロールバルブ部の作動状態を示した断面図、第
３図はその装置のヒステリシスを従来の装置と比
較して示したグラフ、第４図は従来から実施され
ているクラツチ操作システムを示した図、第５図
は従来のクラツチ倍力装置のコントロールバルブ
を示した断面図、第６図はそのコントロールバル
ブの作動状態を示した断面図である。２０……クラツチ倍力装置、２１……パワーシ
リンダ部、２２……ハイドロリツクシリンダ部、
２３……コントロールバルブ部、２４……ハウジ
ング、２４ａ……弁座、２６……パワーピストン
、２９……圧力室、３１……中継ピストン、３２
……ピストンロツド、３３……プツシユロツド、
４０……油液ポート、４１……第１の通路、４３
……弁体、４３ａ……ピストン、４３ｂ……弁座
、４４……バルブリフタ、４４ａ……一端部、４
４ｂ……中央部、４４ｃ……他端部、４４ｄ……
弁座、４５……空圧室、４６……変圧室、４７…
…油圧室、４８……管路、４９……第２の通路、
５０……ピストンガイド、５１……圧縮スプリン
グ、５２……室、５３……ポート、５４……通路
、５５…圧縮スプリング。 Fig. 1 is a longitudinal sectional view showing an embodiment of the clutch booster according to the present invention, Fig. 2 is a sectional view showing the operating state of the control valve section of the device, and Fig. 3 is the hysteresis system of the device. Fig. 4 is a diagram showing a conventional clutch operation system, Fig. 5 is a sectional view showing a control valve of a conventional clutch booster, and Fig. FIG. 6 is a sectional view showing the operating state of the control valve. 20...Clutch booster, 21...Power cylinder section, 22...Hydraulic cylinder section,
23... Control valve part, 24... Housing, 24a... Valve seat, 26... Power piston, 29... Pressure chamber, 31... Relay piston, 32
...Piston rod, 33...Push rod,
40... Oil port, 41... First passage, 43
... Valve body, 43a ... Piston, 43b ... Valve seat, 44 ... Valve lifter, 44a ... One end, 4
4b...Central part, 44c...Other end part, 44d...
Valve seat, 45...pneumatic chamber, 46...variable pressure chamber, 47...
...Hydraulic chamber, 48...Pipe line, 49...Second passage,
50... Piston guide, 51... Compression spring, 52... Chamber, 53... Port, 54... Passage, 55... Compression spring.

Claims

[Scope of utility model registration request]

a pneumatic chamber that communicates with the air reservoir through the valve body and the valve lifter;
A variable pressure chamber communicating with the power cylinder and a hydraulic chamber communicating with the master cylinder are respectively defined,
The oil in the master cylinder is forced into the hydraulic chamber to operate the valve lifter, the valve lifter is brought into contact with the valve body, and the valve body is opened to allow compressed air from the air reservoir to flow from the pneumatic chamber. A clutch booster comprising a control valve that allows the compressed air to flow into the variable pressure chamber and feeds the compressed air to the power cylinder via the variable pressure chamber,
A piston is slidably disposed on a chamber wall defining the pneumatic chamber, a valve seat is formed at one end of the piston to constitute the valve body, and the cross-sectional area of the piston is reduced by the valve lifter. A clutch booster characterized in that the pressure acting area on the variable pressure chamber side of the valve body is made equal to the pressure acting area of the valve body when the valve body is not in contact with the clutch, and the other end of the piston is opened to the atmosphere.